[jira] [Created] (ARROW-12175) CMake's find_package(Parquet) does not find Parquet with Arrow 3.0.0

["Matthias Wolf (Jira)" <ji...@apache.org>]

Matthias Wolf created ARROW-12175:
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             Summary: CMake's find_package(Parquet) does not find Parquet with Arrow 3.0.0
                 Key: ARROW-12175
                 URL: https://issues.apache.org/jira/browse/ARROW-12175
             Project: Apache Arrow
          Issue Type: Bug
          Components: C++
    Affects Versions: 3.0.0
         Environment: RHEL 7.6
Spack environment with CMake 3.15.7
            Reporter: Matthias Wolf


Hello,

I just updated a small utility that converts binary data to Parquet from Arrow 0.15 to 3.0, and noticed that CMake could not resolve {{find_package(Parquet REQUIRED)}}, as my installation tree of Arrow contained {{…/share/cmake/arrow/ParquetConfig.cmake}}, but CMake seems to be expecting {{…/share/cmake/*parquet*/ParquetConfig.cmake.}}

Creating a symbolic link from the {{arrow}} directory to a {{parquet}} directory solved CMake's find procedure. Alternatively, I ended up at this work-around that did not require me modifying my local install tree:
{code:java}
find_package(Arrow REQUIRED)
get_filename_component(MY_SEARCH_DIR ${Arrow_CONFIG} DIRECTORY)
find_package(Parquet REQUIRED HINTS ${MY_SEARCH_DIR})
{code}
Is this expected behavior? I went through the CMake code and found that there is only one installation directory for all CMake files: {{ARROW_CMAKE_INSTALL_DIR}} — I would expect this to be specific to the libraries exported.

Thanks,
Matthias



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